Permissions

The permission nodes that gate each tool and block pickup.

Default permission	Allows
`nomadphysics.physgun`	Using the physgun
`nomadphysics.gravitygun`	Using the gravity gun
`nomadphysics.blocks`	Picking up world blocks with either tool; the tool's own permission is also required
`nomadphysics.admin`	Passing the additional permission check on `/physics tool` to hand out tools

These nodes are configurable and separate from the server's command permissions, so keep administrative commands restricted through your normal permission setup.